McAfee Water System 5 User Manual
McAfee Firewall
70
McAfee Internet Security 5.0
Inbound Data
: No. As long as McAfee Firewall supports a network device
and is running, it is intercepting all incoming packets and will allow or block
according to the way you have it configured. If you choose to block
everything, it will.
according to the way you have it configured. If you choose to block
everything, it will.
Outbound Data
: Yes and no. McAfee Firewall intercepts outbound data
packets as they are passed to the network device driver. All popular
applications communicate this way. A malicious program could communicate
by other means, however.
applications communicate this way. A malicious program could communicate
by other means, however.
What network devices does McAfee Firewall support?
McAfee Firewall supports Ethernet and Ethernet-like devices. This includes
dial-up connections, most cable and ISDN modems and most Ethernet cards.
It does not support Token Ring, FDDI, ATM, Frame Relay and other networks.
dial-up connections, most cable and ISDN modems and most Ethernet cards.
It does not support Token Ring, FDDI, ATM, Frame Relay and other networks.
What protocols can McAfee Firewall filter?
McAfee Firewall can filter TCP/IP, UDP/IP, ICMP/IP and ARP. It intercepts
all protocols, but others, such as IPX, must be either allowed or blocked - no
filtering is done. The Internet uses the IP protocols. No others are sent. Also,
IP networks are the most common.
all protocols, but others, such as IPX, must be either allowed or blocked - no
filtering is done. The Internet uses the IP protocols. No others are sent. Also,
IP networks are the most common.
How can I still be harassed, even with McAfee Firewall?
Many people use McAfee Firewall to block the “nukes” that cause their IRC
connections to be broken. While McAfee Firewall blocks the nukes, there are
other ways that attackers can still cause the connections to be broken:
connections to be broken. While McAfee Firewall blocks the nukes, there are
other ways that attackers can still cause the connections to be broken:
n
Server-side nuking
. This is when the "nukes" are sent to the IRC server,
not to your computer, telling the server that you can no longer be
reached. To prevent this, the IRC server needs a firewall.
reached. To prevent this, the IRC server needs a firewall.
n
Flood blocking a TCP connection
. If a flood of packets is sent to you
from a higher speed connection, McAfee Firewall can stop the packets,
but the flood takes up all your bandwidth. Your system does not get a
chance to send anything. Dial-up users are particularly vulnerable since
they have the lowest speed connections.
but the flood takes up all your bandwidth. Your system does not get a
chance to send anything. Dial-up users are particularly vulnerable since
they have the lowest speed connections.
TIP
To read additional frequently asked questions, refer to the
Readme.txt file.
Readme.txt file.
Getting Started with McAfee Firewall
After installing McAfee Firewall, you will need to configure your software for
its first use. The Configuration Assistant guides you through this process.
its first use. The Configuration Assistant guides you through this process.